External Hardware IO Address Map - Revision history

Barberd at 01:15, 14 April 2026

2026-04-14T01:15:38Z

← Older revision		Revision as of 21:15, 13 April 2026
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	Built-in IO devices:		Built-in IO devices:
	* $FF00-FF3F [[PIA\|Peripheral Interface Adapters (PIAs)]] Used for Keyboard, Joystick, Serial Port, Cassette, FIRQ, Sound, Horizontal and Vertical Sync Interrupts, [[Video Display Generator\|Video Display Generator (VDG)]] modes		* FF00-FF3F [[PIA\|Peripheral Interface Adapters (PIAs)]] Used for Keyboard, Joystick, Serial Port, Cassette, FIRQ, Sound, Horizontal and Vertical Sync Interrupts, [[Video Display Generator\|Video Display Generator (VDG)]] modes
	* $FF90-FFBF [[GIME\|CoCo3 GIME]] Used for memory management unit (MMU) configuration, coco3 video modes/color palette/resolution, coco3 interrupt and fast interrupt controls, and timers		* FF90-FFBF [[GIME\|CoCo3 GIME]] Used for memory management unit (MMU) configuration, coco3 video modes/color palette/resolution, coco3 interrupt and fast interrupt controls, and timers
	* $FFC0-FFDF [[SAM\|Synchronous Address Multiplexer (SAM)]] Used to set clock speed, [[Video Display Generator\|Video Display Generator (VDG)]] modes and memory location/size, and RAM/ROM mode		* FFC0-FFDF [[SAM\|Synchronous Address Multiplexer (SAM)]] Used to set clock speed, [[Video Display Generator\|Video Display Generator (VDG)]] modes and memory location/size, and RAM/ROM mode

Barberd at 01:06, 14 April 2026

2026-04-14T01:06:46Z

← Older revision		Revision as of 21:06, 13 April 2026
Line 42:		Line 42:

	Built-in IO devices:		Built-in IO devices:
	* $FF00-FF3F [[Peripheral Interface Adapters (PIAs)~~\|PIA~~]] Used for Keyboard, Joystick, Serial Port, Cassette, FIRQ, Sound, Horizontal and Vertical Sync Interrupts, [[Video Display Generator ~~(VDG)~~\|Video Display Generator]] modes		* $FF00-FF3F [[PIA\|Peripheral Interface Adapters (PIAs)]] Used for Keyboard, Joystick, Serial Port, Cassette, FIRQ, Sound, Horizontal and Vertical Sync Interrupts, [[Video Display Generator\|Video Display Generator (VDG)]] modes
	* $FF90-FFBF [[~~CoCo3~~ GIME\|GIME]] Used for memory management unit (MMU) configuration, coco3 video modes/color palette/resolution, coco3 interrupt and fast interrupt controls, and timers		* $FF90-FFBF [[GIME\|CoCo3 GIME]] Used for memory management unit (MMU) configuration, coco3 video modes/color palette/resolution, coco3 interrupt and fast interrupt controls, and timers
	* $FFC0-FFDF [[Synchronous Address Multiplexer (SAM)~~\|SAM~~]] Used to set clock speed, [[Video Display Generator ~~(VDG)~~\|Video Display Generator]] modes and memory location/size, and RAM/ROM mode		* $FFC0-FFDF [[SAM\|Synchronous Address Multiplexer (SAM)]] Used to set clock speed, [[Video Display Generator\|Video Display Generator (VDG)]] modes and memory location/size, and RAM/ROM mode

Barberd at 01:05, 14 April 2026

2026-04-14T01:05:19Z

← Older revision		Revision as of 21:05, 13 April 2026
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	~~= External Hardware IO Address Map =~~

	Tandy designated IO addresses from $FF60 to $FF7F for add-on hardware, but several parties chose to build in the $FF40-$FF5F and $FF80-FF8F ranges as well. Here are known IO addresses for add-on hardware.		Tandy designated IO addresses from $FF60 to $FF7F for add-on hardware, but several parties chose to build in the $FF40-$FF5F and $FF80-FF8F ranges as well. Here are known IO addresses for add-on hardware.

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	Note some devices overlap each other; these devices will conflict and cannot be used together without modification.		Note some devices overlap each other; these devices will conflict and cannot be used together without modification.

	Built-in IO devices ~~(such as the PIAs (~~$FF00-FF3F), ~~CoCo3 GIME~~ ($FF90-FFBF), and ~~SAM (~~$FFC0-FFDF)) ~~also take the IO space. The 6809~~/~~6309 CPU uses $FFF0-FFFF for interrupt vectors.~~		Built-in IO devices:
			* $FF00-FF3F [[Peripheral Interface Adapters (PIAs)\|PIA]] Used for Keyboard, Joystick, Serial Port, Cassette, FIRQ, Sound, Horizontal and Vertical Sync Interrupts, [[Video Display Generator (VDG)\|Video Display Generator]] modes
			* $FF90-FFBF [[CoCo3 GIME\|GIME]] Used for memory management unit (MMU) configuration, coco3 video modes/color palette/resolution, coco3 interrupt and fast interrupt controls, and timers
			* $FFC0-FFDF [[Synchronous Address Multiplexer (SAM)\|SAM]] Used to set clock speed, [[Video Display Generator (VDG)\|Video Display Generator]] modes and memory location/size, and RAM/ROM mode

Barberd: /* External Hardware IO Address Map */

2026-03-25T15:24:25Z

External Hardware IO Address Map

← Older revision		Revision as of 11:24, 25 March 2026
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	* FF6C-FF6F [[Direct Connect Modem Pak]]		* FF6C-FF6F [[Direct Connect Modem Pak]]
	* FF6E-FF6F [[MIDI Maestro]]		* FF6E-FF6F [[MIDI Maestro]]
	* FF70-FF7F [[Glenside IDE Controller]] (second jumper option)		* FF70-FF7F [[Glenside IDE Controller]] (second jumper option) This conflicts with the MPI selection register.
	* FF70-FF73 [https://github.com/barberd/coco9511pak Am9511 Arithmetic Processor Unit Pak] (default address, modified with dip switches)		* FF70-FF73 [https://github.com/barberd/coco9511pak Am9511 Arithmetic Processor Unit Pak] (default address, modified with dip switches)
	* FF74-FF75 [[Cloud-9 TC^3 SCSI Interface]] default settings, modified with jumpers		* FF74-FF75 [[Cloud-9 TC^3 SCSI Interface]] default settings, modified with jumpers

Barberd: /* External Hardware IO Address Map */

2026-03-25T15:14:00Z

External Hardware IO Address Map

← Older revision		Revision as of 11:14, 25 March 2026
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	* FF50-FF5F [[Disto Super Disk Controller II]]		* FF50-FF5F [[Disto Super Disk Controller II]]
	* FF50-FF5B [[MEGA mini MPI]] Serial UART B (gated via $FF7F)		* FF50-FF5B [[MEGA mini MPI]] Serial UART B (gated via $FF7F)
			* FF59 [[Cloud-9 miniFLASH]] default address, modified with jumpers
	* FF5A-FF5F [[CoCo PSG]]		* FF5A-FF5F [[CoCo PSG]]
	* FF59 [[Cloud-9 miniFLASH]] default address, modified with jumpers
	* FF60-FF62 [[X-Pad Model GT-116]]		* FF60-FF62 [[X-Pad Model GT-116]]
	* FF64-FF67 [https://www.go4retro.com/products/cocoflash/ Retro Innovations CoCoFLASH]		* FF64-FF67 [https://www.go4retro.com/products/cocoflash/ Retro Innovations CoCoFLASH]
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	* FF74-FF75 [[Cloud-9 TC^3 SCSI Interface]] default settings, modified with jumpers		* FF74-FF75 [[Cloud-9 TC^3 SCSI Interface]] default settings, modified with jumpers
	* FF74-FF77 [[Disto Super Disk Controller II]]		* FF74-FF77 [[Disto Super Disk Controller II]]
	* FF7A-FF7B [[Orchestra-90 CC (26-3143)]]
	* FF76-FF79 [[Wordpak RS]]		* FF76-FF79 [[Wordpak RS]]
	* FF78-FF7B [[CocoIO]] (second jumper option)		* FF78-FF7B [[CocoIO]] (second jumper option)
	* FF78-FF79 & FF7C [[Cloud-9 SuperIDE Interface]] Real Time Clock		* FF78-FF79 & FF7C [[Cloud-9 SuperIDE Interface]] Real Time Clock
			* FF7A-FF7B [[Orchestra-90 CC (26-3143)]]
	* FF7D-FF7E [[Speech/Sound Cartridge (26-3144A)]]		* FF7D-FF7E [[Speech/Sound Cartridge (26-3144A)]]
	* FF7F [[Multi-Pak]] Slot Selection Register		* FF7F [[Multi-Pak]] Slot Selection Register
	* FF80-FF84 [https://colorcomputerarchive.com/repo/Documents/Manuals/Applications/Super%20Voice%20(Speech%20Systems).pdf Speech Systems Super Voice]		* FF80-FF84 [https://colorcomputerarchive.com/repo/Documents/Manuals/Applications/Super%20Voice%20(Speech%20Systems).pdf Speech Systems Super Voice]
	* FF86-FF87 [https://github.com/barberd/cocousbhost CoCo USB Host] (default address, modified with dip switches)		* FF86-FF87 [https://github.com/barberd/cocousbhost CoCo USB Host] (default address, modified with dip switches)
			* FF98-FF9C [[PBJ Wordpak/Wordpak II]] (this conflicts with the GIME on a CoCo3)
	* FFE0-FFE9 & FFEF [https://thezippsterzone.com/2019/03/27/gime-x/ GIME-X for CoCo 3]		* FFE0-FFE9 & FFEF [https://thezippsterzone.com/2019/03/27/gime-x/ GIME-X for CoCo 3]
	* FF98-FF9C [[PBJ Wordpak/Wordpak II]] (this conflicts with the GIME on a CoCo3)

	Note some devices overlap each other; these devices will conflict and cannot be used together without modification.		Note some devices overlap each other; these devices will conflict and cannot be used together without modification.

	Built-in IO devices (such as the PIAs ($FF00-FF3F), CoCo3 GIME ($FF90-FFBF), and SAM ($FFC0-FFDF)) also take the IO space. The 6809/6309 CPU uses $FFF0-FFFF for interrupt vectors.		Built-in IO devices (such as the PIAs ($FF00-FF3F), CoCo3 GIME ($FF90-FFBF), and SAM ($FFC0-FFDF)) also take the IO space. The 6809/6309 CPU uses $FFF0-FFFF for interrupt vectors.

Barberd: /* External Hardware IO Address Map */

2026-03-25T01:49:45Z

External Hardware IO Address Map

← Older revision		Revision as of 21:49, 24 March 2026
Line 31:		Line 31:
	* FF74-FF77 [[Disto Super Disk Controller II]]		* FF74-FF77 [[Disto Super Disk Controller II]]
	* FF7A-FF7B [[Orchestra-90 CC (26-3143)]]		* FF7A-FF7B [[Orchestra-90 CC (26-3143)]]
	* FF76-~~FF77~~ [[Wordpak RS]]		* FF76-FF79 [[Wordpak RS]]
	* FF78-FF7B [[CocoIO]] (second jumper option)		* FF78-FF7B [[CocoIO]] (second jumper option)
	* FF78-FF79 & FF7C [[Cloud-9 SuperIDE Interface]] Real Time Clock		* FF78-FF79 & FF7C [[Cloud-9 SuperIDE Interface]] Real Time Clock

Barberd: /* External Hardware IO Address Map */

2026-03-24T15:56:49Z

External Hardware IO Address Map

← Older revision		Revision as of 11:56, 24 March 2026
Line 31:		Line 31:
	* FF74-FF77 [[Disto Super Disk Controller II]]		* FF74-FF77 [[Disto Super Disk Controller II]]
	* FF7A-FF7B [[Orchestra-90 CC (26-3143)]]		* FF7A-FF7B [[Orchestra-90 CC (26-3143)]]
			* FF76-FF77 [[Wordpak RS]]
	* FF78-FF7B [[CocoIO]] (second jumper option)		* FF78-FF7B [[CocoIO]] (second jumper option)
	* FF78-FF79 & FF7C [[Cloud-9 SuperIDE Interface]] Real Time Clock		* FF78-FF79 & FF7C [[Cloud-9 SuperIDE Interface]] Real Time Clock
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	* FF86-FF87 [https://github.com/barberd/cocousbhost CoCo USB Host] (default address, modified with dip switches)		* FF86-FF87 [https://github.com/barberd/cocousbhost CoCo USB Host] (default address, modified with dip switches)
	* FFE0-FFE9 & FFEF [https://thezippsterzone.com/2019/03/27/gime-x/ GIME-X for CoCo 3]		* FFE0-FFE9 & FFEF [https://thezippsterzone.com/2019/03/27/gime-x/ GIME-X for CoCo 3]
			* FF98-FF9C [[PBJ Wordpak/Wordpak II]] (this conflicts with the GIME on a CoCo3)

	Note some devices overlap each other; these devices will conflict and cannot be used together without modification.		Note some devices overlap each other; these devices will conflict and cannot be used together without modification.

	Built-in IO devices (such as the PIAs ($FF00-FF3F), CoCo3 GIME ($FF90-FFBF), and SAM ($FFC0-FFDF)) also take the IO space. The 6809/6309 CPU uses $FFF0-FFFF for interrupt vectors.		Built-in IO devices (such as the PIAs ($FF00-FF3F), CoCo3 GIME ($FF90-FFBF), and SAM ($FFC0-FFDF)) also take the IO space. The 6809/6309 CPU uses $FFF0-FFFF for interrupt vectors.

Barberd: /* External Hardware IO Address Map */

2025-02-23T02:16:54Z

External Hardware IO Address Map

← Older revision		Revision as of 22:16, 22 February 2025
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	* FF64-FF67 [https://www.go4retro.com/products/cocoflash/ Retro Innovations CoCoFLASH]		* FF64-FF67 [https://www.go4retro.com/products/cocoflash/ Retro Innovations CoCoFLASH]
	* FF68-FF6B [[Deluxe RS232 Pak]]		* FF68-FF6B [[Deluxe RS232 Pak]]
			* FF68-FF6B [https://github.com/barberd/cocousbserial CoCo USB Serial Cartridge] (default address, modified with dip switches)
	* FF68-FF6B [[CoCoIO]] (first jumper option)		* FF68-FF6B [[CoCoIO]] (first jumper option)
	* FF6C-FF6F [[Direct Connect Modem Pak]]		* FF6C-FF6F [[Direct Connect Modem Pak]]
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	* FF7F [[Multi-Pak]] Slot Selection Register		* FF7F [[Multi-Pak]] Slot Selection Register
	* FF80-FF84 [https://colorcomputerarchive.com/repo/Documents/Manuals/Applications/Super%20Voice%20(Speech%20Systems).pdf Speech Systems Super Voice]		* FF80-FF84 [https://colorcomputerarchive.com/repo/Documents/Manuals/Applications/Super%20Voice%20(Speech%20Systems).pdf Speech Systems Super Voice]
	* FF86-FF87 [https://github.com/barberd/~~cocousbpak~~ CoCo USB ~~Pak~~] (default address, modified with dip switches)		* FF86-FF87 [https://github.com/barberd/cocousbhost CoCo USB Host] (default address, modified with dip switches)
	* FFE0-FFE9 & FFEF [https://thezippsterzone.com/2019/03/27/gime-x/ GIME-X for CoCo 3]		* FFE0-FFE9 & FFEF [https://thezippsterzone.com/2019/03/27/gime-x/ GIME-X for CoCo 3]

Barberd: /* External Hardware IO Address Map */

2025-02-22T02:08:27Z

External Hardware IO Address Map

← Older revision		Revision as of 22:08, 21 February 2025
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	* FF40-FF45 [[MEGA mini MPI]] Extended MPI Features (gated via $FF7F)		* FF40-FF45 [[MEGA mini MPI]] Extended MPI Features (gated via $FF7F)
	* FF40-FF41 [[Game Master Cart]]		* FF40-FF41 [[Game Master Cart]]
	* FF40-FF7F [[~~FHL_Eliminator~~]] Dual Serial Ports (exact 8 byte range selected with jumpers, FF60-FF67 standard)		* FF40-FF7F [[FHL Eliminator]] Dual Serial Ports (exact 8 byte range selected with jumpers, FF60-FF67 standard)
	* FF40-FF7F [[~~FHL_Eliminator~~]] HCA, RTC, Printer Port (exact 8 byte range selected with jumpers, FF70-FF77 standard)		* FF40-FF7F [[FHL Eliminator]] HCA, RTC, Printer Port (exact 8 byte range selected with jumpers, FF70-FF77 standard)
	* FF41-FF42 Becker Port used by [[CoCo3FPGA]] and some emulators for [[DriveWire]] access		* FF41-FF42 Becker Port used by [[CoCo3FPGA]] and some emulators for [[DriveWire]] access
	* FF4C-FF4F Some third party Floppy Disk Controlers: [[Sardis Technologies 'no-halt' Controller\|Sardis]], [[J&M/Owl-Ware\|JFD]], [[Disto Super Disk Controller]], and [[Disto Super Disk Controller II]]		* FF4C-FF4F Some third party Floppy Disk Controlers: [[Sardis Technologies 'no-halt' Controller\|Sardis]], [[J&M/Owl-Ware\|JFD]], [[Disto Super Disk Controller]], and [[Disto Super Disk Controller II]]

Barberd: /* External Hardware IO Address Map */

2025-02-22T02:06:06Z

External Hardware IO Address Map

← Older revision		Revision as of 22:06, 21 February 2025
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	* FF40-FF45 [[MEGA mini MPI]] Extended MPI Features (gated via $FF7F)		* FF40-FF45 [[MEGA mini MPI]] Extended MPI Features (gated via $FF7F)
	* FF40-FF41 [[Game Master Cart]]		* FF40-FF41 [[Game Master Cart]]
			* FF40-FF7F [[FHL_Eliminator]] Dual Serial Ports (exact 8 byte range selected with jumpers, FF60-FF67 standard)
			* FF40-FF7F [[FHL_Eliminator]] HCA, RTC, Printer Port (exact 8 byte range selected with jumpers, FF70-FF77 standard)
	* FF41-FF42 Becker Port used by [[CoCo3FPGA]] and some emulators for [[DriveWire]] access		* FF41-FF42 Becker Port used by [[CoCo3FPGA]] and some emulators for [[DriveWire]] access
	* FF4C-FF4F Some third party Floppy Disk Controlers: [[Sardis Technologies 'no-halt' Controller\|Sardis]], [[J&M/Owl-Ware\|JFD]], [[Disto Super Disk Controller]], and [[Disto Super Disk Controller II]]		* FF4C-FF4F Some third party Floppy Disk Controlers: [[Sardis Technologies 'no-halt' Controller\|Sardis]], [[J&M/Owl-Ware\|JFD]], [[Disto Super Disk Controller]], and [[Disto Super Disk Controller II]]
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	* FF7F [[Multi-Pak]] Slot Selection Register		* FF7F [[Multi-Pak]] Slot Selection Register
	* FF80-FF84 [https://colorcomputerarchive.com/repo/Documents/Manuals/Applications/Super%20Voice%20(Speech%20Systems).pdf Speech Systems Super Voice]		* FF80-FF84 [https://colorcomputerarchive.com/repo/Documents/Manuals/Applications/Super%20Voice%20(Speech%20Systems).pdf Speech Systems Super Voice]
			* FF86-FF87 [https://github.com/barberd/cocousbpak CoCo USB Pak] (default address, modified with dip switches)
	* FFE0-FFE9 & FFEF [https://thezippsterzone.com/2019/03/27/gime-x/ GIME-X for CoCo 3]		* FFE0-FFE9 & FFEF [https://thezippsterzone.com/2019/03/27/gime-x/ GIME-X for CoCo 3]